Prunella vulgaris. Wildflower native to the UK, where it's found growing in grassland, meadows and lawns. It's a low-growing, semi-evergreen perennial with spikes of violet-blue flowers, June- September. Add to your wildflower patch, at the front of a border, or used as ground cover. It self-seeds easily so if not deadheaded, it will spread. The flowers are extremely attractive to bees and other insects. Medicinally is used for inflammation.